[PATCH] scripts/decode_stacktrace: Accept dash/underscore in modules

[Evan Green <evgreen@chromium.org>]

The manpage for modprobe mentions that dashes and underscores are
treated interchangeably in module names. The stack trace dumps seem
to print module names with underscores. Use bash to replace _ with
the pattern [-_] so that file names with dashes or underscores can be
found.

For example, this line:
[   27.919759]  hda_widget_sysfs_init+0x2b8/0x3a5 [snd_hda_core]

should find a module named snd-hda-core.ko.

Signed-off-by: Evan Green <evgreen@chromium.org>
---

Note: This should apply atop linux-next.

Thanks to Doug for showing me the bash string substitution magic.

---
 scripts/decode_stacktrace.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index fa704f17275e..13e5fbafdf2f 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -28,7 +28,7 @@ parse_symbol() {
 		local objfile=${modcache[$module]}
 	else
 		[[ $modpath == "" ]] && return
-		local objfile=$(find "$modpath" -name "$module.ko*" -print -quit)
+		local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit)
 		[[ $objfile == "" ]] && return
 		modcache[$module]=$objfile
 	fi
-- 
2.20.1